Finding the Fourth Proportional to 3,456,399.97, 4,767,135.42 and 2,216,128.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456,399.97 : 4,767,135.42 = 2,216,128.78 : x
2. Step 2: Convert to fraction form
   3,456,399.97/4,767,135.42 = 2,216,128.78/x
3. Step 3: Cross multiply
   3,456,399.97x = 4,767,135.42 × 2,216,128.78
4. Step 4: Simplify right side
   3,456,399.97x = 10,564,586,016,688.79
5. Step 5: Solve for x
   x = 10,564,586,016,688.79/3,456,399.97
6. Step 6: Final answer
   x = 3,056,528.79